183-8814 1838814 0R-9737 CAT Excavator Engine Crankshaft for 3508 3512 3516

The 183-8814 (including alternative models 1838814, 0R-9737) Crankshaft is the core power center of CAT 3508, 3512, 3516 series heavy-duty excavator engines. It is made of high-strength alloy forged steel through the whole process of "integral forging - multi-stage quenching and tempering - precision grinding", and serves as the core executive component for the engine to convert "reciprocating motion into rotational power". Strictly developed in accordance with CAT's original engineering drawings, the crankshaft has an overall structure including multiple sets of main journals, connecting rod journals, reinforced crank arms and integrated balance weights. Aiming at the characteristics of large displacement and high power of the 35-series engine, it adopts a streamlined reinforcement design at the journal transition, and the surface is subjected to deep nitriding hardening treatment, with dimensional accuracy controlled at the 0.003mm level. It is accurately adapted to the cylinder block crankcase of 3508/3512/3516 engines, and works in coordination with high-power piston connecting rod groups and heavy flywheels. It undertakes the core responsibilities of transmitting in-cylinder explosion pressure and driving the excavator bucket excavation and slewing mechanism operation. Widely used in ultra-heavy-duty working conditions such as mine stripping and large-scale infrastructure, it provides rigid support for the continuous and stable output of the engine.